----- Original Message -----
I am trying to execute power top on my Virtual Machine with specification OS
6.5 Scientific Linux and I get the following message : pread cpu0 0xe8 :
input/output error. The powertop version i am using is 2.3. I have tried
running older versions like 1.11 which was running properly but as I red
1.11 measures cpu wake ups and not energy consumption as the 2.3. Any idea
what the problem may be and how can I solve it ?
BSc in Network and System Programming
Computer Science Department
University of Cyprus
MSc in Pervasive Computing and Communications
for Sustainable Development (PERCCOM)
Joint Master Degree
University of Lorraine, Lappeenranta, Lulea, ITMO Saint-Petersburg
PowerTop mailing list
AFAIK the problem is that virtual machines don't correctly implement
Machine State Registers (MSRs) or don't implement them at all.
I tried to address the problem by patch sent earlier allowing PowerTOP
to continue running in virtualized environments.
It will probably not resolve your problem with energy consumption
measurement, because there is usually no usable ACPI battery in the
thanks & regards